How do you solve the following system?: -3x -2y =5, -4x +7y = -3
1 Answer
Dec 23, 2015
Explanation:
To solve this question there are a number of ways, the most basic being rearrangement and substitution.
To start off you would rearrange the top equation to get y by itself, to do this you would follow these steps
Which gives the answer
Y isn't by itself yet so you would then:
Giving the answer
Now you must substitute this into the second equation, it would look like this:
You would then simplify to get:
Which then simplifies to:
Therefore
Then substitute the value of
Which gives the answer:
